Unmultiply is a game of quick estimation. You need to find two numbers that multiply together to something close to the given target - fast! 10 levels with a high scores table.

A game that tests your understanding of remainders.

We think this 3x3 version of the game is often harder than the 5x5 version. Do you agree? If so, why do you think that might be?

Who said that adding, subtracting, multiplying and dividing couldn't be fun?

Slide the pieces to move Khun Phaen past all the guards into the position on the right from which he can escape to freedom.

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

Basic strategy games are particularly suitable as starting points for investigations. Players instinctively try to discover a winning strategy, and usually the best way to do this is to analyse. . . .

There are nasty versions of this dice game but we'll start with the nice ones...

Given the products of diagonally opposite cells - can you complete this Sudoku?

First Connect Three game for an adult and child. Use the dice numbers and either addition or subtraction to get three numbers in a straight line.

A game for 2 or more people, based on the traditional card game Rummy. Players aim to make two `tricks', where each trick has to consist of a picture of a shape, a name that describes that shape, and. . . .

A game for 2 players. Can be played online. One player has 1 red counter, the other has 4 blue. The red counter needs to reach the other side, and the blue needs to trap the red.

A game in which players take it in turns to choose a number. Can you block your opponent?

Take turns to place a decimal number on the spiral. Can you get three consecutive numbers?

Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple. . . .

The idea of this game is to add or subtract the two numbers on the dice and cover the result on the grid, trying to get a line of three. Are there some numbers that are good to aim for?

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your oponent.

Interactive game. Set your own level of challenge, practise your table skills and beat your previous best score.

The aim of the game is to slide the green square from the top right hand corner to the bottom left hand corner in the least number of moves.

Players take it in turns to choose a dot on the grid. The winner is the first to have four dots that can be joined to form a square.

Start with any number of counters in any number of piles. 2 players take it in turns to remove any number of counters from a single pile. The winner is the player to take the last counter.

This article invites you to get familiar with a strategic game called "sprouts". The game is simple enough for younger children to understand, and has also provided experienced mathematicians with. . . .

A simple game for 2 players invented by John Conway. It is played on a 3x3 square board with 9 counters that are black on one side and white on the other.

A game for 2 players. Given an arrangement of matchsticks, players take it is turns to remove a matchstick, along with all of the matchsticks that touch it.

This is a game for two players. You will need some small-square grid paper, a die and two felt-tip pens or highlighters. Players take turns to roll the die, then move that number of squares in. . . .

All you need for this game is a pack of cards. While you play the game, think about strategies that will increase your chances of winning.

This article explains the use of the idea of connectedness in networks, in two different ways, to bring into focus the basics of the game of Go, namely capture and territory.

An article for teachers and pupils that encourages you to look at the mathematical properties of similar games.

A simple game of patience which often comes out. Can you explain why?

Can you spot the similarities between this game and other games you know? The aim is to choose 3 numbers that total 15.

Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

Use the tangram pieces to make our pictures, or to design some of your own!

Two sudokus in one. Challenge yourself to make the necessary connections.

Advent Calendar 2010 - a mathematical game for every day during the run-up to Christmas.

The computer starts with all the lights off, but then clicks 3, 4 or 5 times at random, leaving some lights on. Can you switch them off again?

Spiralling Decimals game for an adult and child. Can you get three decimals next to each other on the spiral before your partner?

Square It game for an adult and child. Can you come up with a way of always winning this game?

Four numbers on an intersection that need to be placed in the surrounding cells. That is all you need to know to solve this sudoku.

Two sudokus in one. Challenge yourself to make the necessary connections.

A game to make and play based on the number line.

Here is a solitaire type environment for you to experiment with. Which targets can you reach?

This pair of linked Sudokus matches letters with numbers and hides a seasonal greeting. Can you find it?

Practise your diamond mining skills and your x,y coordination in this homage to Pacman.

Collect as many diamonds as you can by drawing three straight lines.

The game of go has a simple mechanism. This discussion of the principle of two eyes in go has shown that the game does not depend on equally clear-cut concepts.